8.7
High
CVE-2026-70455 rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust system…
Description
rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust system resources by specifying the --zt short alias for --compress-threads, which bypasses the refuse options directive's string matching on long option names. Attackers can specify --zt=N with a large value to spawn an unbounded number of Zstandard worker threads on the receiver, exhausting available thread and memory resources.
Affected products and versions
Other CVEs of rsync
The 44 CVEs of rsync →
CVE-2026-119741
rsync < 3.5.2 Denial of Service via hash_search() Checksum Collisions
8.7
High
CVE-2026-70452
rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent…
9.1
Critical
CVE-2026-70453
rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote…
8.7
High
CVE-2026-70454
rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS certificate validation…
7.6
High